You cannot vote in Local/General Elections? Your country hasn't a functional and free Judiciary system?
Obviously people must care about holding their representatives & Government accountable otherwise No one would be held responsible and accountable for anything.
The problem is, simply losing the next election isn't really being "held accountable". Yeah you'll no longer be in political office, but you've already made your fortune by then and are set for life. Individuals follow their own self-interest. If a politician is promised a lucrative lifelong career after their term ends in exchange for voting a certain way on a certain bill, or introducing certain language into a certain bill, they likely will. In the end, the only entity that is held accountable for everything is the taxpayer.